TITLE: GCN CIRCULAR NUMBER: 32825 SUBJECT: GRB 221023A: AGILE detection of a burst DATE: 22/10/24 07:33:58 GMT FROM: Alessandro Ursi at INAF/IAPS A. Ursi (INAF/IAPS), C. Pittori, F. Verrecchia (SSDC, and INAF/OAR), C. Casentini (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Argan, M. Cardillo, Y. Evangelista, L. Foffano, E. Menegoni, G. Piano (INAF/IAPS), A. Bulgarelli, A. Di Piano, V. Fioretti, G. Panebianco, N. Parmiggiani (INAF/OAS-Bologna), F. Lucarelli (SSDC, and INAF/OAR), M. Romani (INAF/OA-Brera), M. Marisaldi (INAF/OAS-Bologna, and Bergen University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi), F. Longo (Univ. Trieste and INFN Trieste), and P. Tempesta (TeleSpazio), report on behalf of the AGILE Team: The AGILE satellite detected a burst at T0 = 2022-10-23 20:41:34 s (UTC). The burst is clearly visible in the AGILE scientific ratemeters of the MiniCALorimeter (MCAL; 0.4-100 MeV) and AntiCoincidence (AC; 50-200 keV) detectors. The event lasted about 35 s and it released a total number of 115660 counts in the MCAL detector (above a background rate of 1120 Hz), and 251030 counts in the AC detector (above a background rate of 3010 Hz). The AGILE ratemeters light curves can be found at http://www.agilescienceapp.it/notices/GRB221023A_AGILE_RM.png . The event also triggered a partial high time resolution MCAL data acquisition, from T0+23.34 s to T0+33.35 s (UTC), and released 18196 counts in the detector, above a background rate of 590 Hz. The MCAL light curve can be found at http://www.agilescienceapp.it/notices/GRB221023A_080618_593642494.000000.png . Additional analysis of AGILE data is in progress. Automatic MCAL GRB alert Notices can be found at: https://gcn.gsfc.nasa.gov/agile_mcal.html.